ADR530BRT-REEL7 datasheet(7/16 Pages) AD

Part #	ADR530BRT-REEL7

Description	High Precision Shunt Mode Voltage References

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ADR520/ADR525/ADR530/ADR540/ADR550

Rev. A | Page 7 of 16

PARAMETER DEFINITIONS

TEMPERATURE COEFFICIENT

Temperature coefficient is defined as the change in output

voltage with respect to operating temperature changes, and is

normalized by an output voltage of 25°C. This parameter is

expressed in ppm/°C, and is determined by the following

equation:

()

( )

()

6

10

25

×

−

×

°

−

=

⎥⎦

⎤

⎢⎣

⎡

°

1

2

O

1

O

2

O

T

C

V

T

V

T

V

C

ppm

TCV

(1)

where:

VO(25°C) = VO at 25°C.

VO(T1) = VO at Temperature 1.

VO(T2) = VO at Temperature 2.

THERMAL HYSTERESIS

Thermal hysteresis is defined as the change in output voltage

after the device is cycled through temperatures ranging from

+25°C to –40°C, then to +85°C, and back to +25°C. The

following equation expresses a typical value from a sample of

parts put through such a cycle:

(

)

[]

()

6

_

10

25

×

°

−

°

=

−

°

=

C

V

C

V

ppm

V

C

V

O

TC

O

HYS

O

TC

O

HYS

O

(2)

where:

VO(25°C) = VO at 25°C.

VO_TC = VO at 25°C after a temperature cycle from +25°C to

–40°C, then to +85°C, and back to +25°C.

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